Picture two approaches to the same goal: an ambitious overhaul that demands a burst of motivation every single day, versus a small version that barely needs any.
The overhaul might mean an hour at the gym, a full meal prep session and a strict bedtime, all starting Monday. It looks impressive on paper and it's heavy on motivation, which means the day motivation dips, the whole structure collapses.
The smaller version might be five minutes of movement, one meal swapped, lights off ten minutes earlier. Lower effort means it survives a bad mood, a bad night's sleep, a bad week, because there's barely anything to collapse.
That's the real argument for discipline-built systems over motivation-fuelled sprints: not that they're more impressive, but that they're still standing on the days you'd otherwise do nothing at all.